The pulse frequency noise of magnetars and persistent accretion powered pulsars

Download

12626159.pdf

Date

2021-2-03

Author

Serim, Danjela

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

188
views

142
downloads

In this thesis, the pulse frequency fluctuations of magnetars and six selected persis-tent accreting powered pulsars (PAPPs) are presented. Using the data fromRXTE,XMM-Newton, Chandra, SwiftandFERMIobservatories, the timing noise behav-ior of individual sources on various timescales are examined, depending on the datasampling rate of input frequency measurements. The timing noise amplitudes are an-alyzed via two separate methods, namely∆8andr.m.smethods. The timing noisecharacteristics of both magnetars and PAPPs are investigated together with a sampleof 366 radio pulsars obtained from literature. The relations of timing noise behaviorwith the physical quantities are examined with an aim of exploring the origin of thenoise process in different source samples. The focus of the study is to understand thetiming noise behavior of magnetars and accretion powered pulsars. The results showthat there is a connection between timing noise behavior of magnetars and radio pul-sars, in fact they form a continuum. Furthermore, the timing noise in magnetars donot exhibit footprints of accretion. On the other hand, PAPs display a rather distinc-tive timing behavior that is induced by inhomogeneities in the accretion flow. Hence,the results of this study suggests that timing noise of magnetars originate from the extreme magnetic field strengths and outburst activities.

Subject Keywords

Magnetar, Timing noise, X-ray timing, Acceting pulsars

URI

https://hdl.handle.net/11511/89675

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Pulse frequency changes of 1E 2259+586 and the binary interpretation Baykal, Altan (1996-03-20) Pulse frequencies from the archival ROSAT observations of 1E 2259+586 are presented. A short-term spin-up episode superposed on the secular spin-down trend is observed. Combining the previously published pulse frequencies, we estimate the variance of the angular velocity over a 15 yr span of observations. The level of fluctuations in angular velocity is similar to that of established accreting binary neutron stars. These results favor accretion by a neutron star from a very low mass companion as the source ...
The spectrum and dips of RE 0751+14: A joint evaluation of ROSAT and ASCA archival data Kiziloglu, U; Baykal, Altan; Alev, M; Gogus, E (1998-01-01) Using archival ASCA and ROSAT observations of RE 0751+14, X-ray energy spectra, pulse profiles and the results of pulse timing analysis are presented. The energy spectra are well-fitted by a blackbody model at low energy and a Raymond-Smith model at high energy, together with a partial covering absorber. A fluorescence emission line at 6.4 keV with an equivalent width similar to 220 eV was resolved for the first time.
Electron performance measurements with the ATLAS detector using the 2010 LHC proton-proton collision data Aad, G.; et. al. (2012-03-01) Detailed measurements of the electron performance of the ATLAS detector at the LHC are reported, using decays of the Z, W and J/psi particles. Data collected in 2010 at root s = 7 TeV are used, corresponding to an integrated luminosity of almost 40 pb(-1). The inter-alignment of the inner detector and the electromagnetic calorimeter, the determination of the electron energy scale and resolution, and the performance in terms of response uniformity and linearity are discussed. The electron identification, rec...
The effect of antisymmetric tensor unparticle mediation on the charged lepton electric dipole moment Iltan, E. O. (IOP Publishing, 2011-10-01) We study the contribution of antisymmetric tensor unparticle mediation to the charged lepton electric dipole moments and restrict the free parameters of the model by using the experimental upper bounds. We observe that the charged lepton electric dipole moments are strongly sensitive to the scaling dimension d(U) and the fundamental scales M(U) and Delta(U). The experimental current limits of electric dipole moments are reached for the small values of the scaling dimension d(U).
The Spectral and temporal properties of MAXI J1409-619 Dönmez, Çağatay Kerem; Baykal, Altan; Department of Physics (2019) In this thesis, spectral and timing analysis of the transient high-mass X-ray binary (HMXB) pulsar MAXI J1409-619 are presented. MAXI J1409-619 was discovered in October 2010, and went into an outburst in early December 2010 until February 2011. Observations of Swift and RXTE throughout this period are used in the thesis. The analysis results are in line with the assertion that MAXI J1409-619 is an accretion-powered pulsar. Time-resolved energy spectra of RXTE and Swift data confirm the previously reported ...

Citation Formats

D. Serim, “The pulse frequency noise of magnetars and persistent accretion powered pulsars,” Ph.D. - Doctoral Program, Middle East Technical University, 2021.